Monday, October 24, 2011
Learning, Part Two
Tuesday, June 21, 2011
Shout Outs
Shrink Rap is hosting our third Grand Rounds today on June 21, which is the first day of Summer. In keeping with the summer solstice theme, we asked for submissions that have a theme of "hot." However, "hot" may refer to not just temperature, but also spiciness, luck, passion, anger, popularity, etc.Our first Grand Rounds in 2007 featured a clicky brain, and the second featured the then-new iPhone 3G, complete with clicky iPhone apps. This time, we've used clicky pictures that exemplify the "hot" theme. . ……..
……The goal of all this was to answer a question: Is it possible to see something really, really obvious and not perceive it? …….When psychologists Chabris and Simons ……..They do research on something called inattentional blindness, or how people fail to see things that are directly in front of them when they're focused on something else. And in Conley they felt they had found a compelling example. ……….
A nurse pulls a vial of heparin from an automated dispensing cabinet (ADC). She reads the label, prepares the medication, and administers it intravenously to an infant. The infant receives heparin in a concentration of 10,000 units/mL instead of 10 units/mL and dies. ……Expectation has a powerful effect on our ability to pay attention and notice information. If the medication we are looking for comes in a carton with a highly stylized label, we come to expect this presentation every time we look for the medication…….
A sunburn tells you that damage and inflammation have happened inside your skin from UV exposure; you exposed yourself to more sun than your skin type can handle…..and there’s simply no good news about it! ….In this Sunburn Series I’m going to give you a dermatologist’s explanation of what happens in your skin when you get
- a sunburn (i.e. why it’s red and hurts)
- a tan (i.e. how much sun protection you get from one)
I’m also going to give you some helpful information to heal sunburned skin and explain how to prevent ever getting a sunburn again. …….
…..I will answer three different ones for you: Why do we menstruate? What did we do back in the day? and What is appropriate today?Why do we menstruate?Humans are not the only animals to undergo cycles of growth and regression in our endometrial lining. Yet, only a few animals actually menstruate. Menstruation has occasionally been observed in other great apes (this is the primate group where humans belong, with the chimps, bonobos, gorillas and orangs), and a few other animals. As far as we can tell, everyone else resorbs the lining before growing a new one. It seems to be that those animals who menstruate, do so because the amount of lining they have is greater than what they are able to resorb. …….
I’m in a Sadistic/ Masochistic relationship, and I like it. Now don’t get any crazy ideas, but really I let this guy strap electrodes to my leg, put me in a 40 pound flack jacket and then do exercises, and that is just the beginning. Yep, I’m talking about my physical therapist. Still I go back twice a week because he knows what he’s doing and I’m getting better. ………I go, I go twice a week. I spend 3 +/- hours there and I do whatever he says. My reward, today he had me run on a treadmill. 5 months after my surgery and I’m starting to run again. I’m well on the road back. It feels great. I’m good with this S&M thing we have going on! ……..
You may have heard about it through the sewing grapevine, but now it's nearly here - the premiere of "It's Sew Easy" is June 30 on PBS stations across the country. It's great news when a national audience is exposed to the fun of sewing!"It’s Sew Easy" replaces "America Sews with Sue Hausmann," promising to give faithful viewers a new spin on sewing where America Sews left off. …….
Wednesday, January 12, 2011
Propranolol Treatment for Infantile Hemangiomas
Their treatment protocol is referenced to the 5th article below.As part of a larger study, we have used propranolol in a total of 15 patients. So far, we have observed signs of rapid involution of hemangioma within the first week of treatment in all patients. The response rate is faster than those we have seen when corticosteroids are used. In addition to stopping the proliferation of hemangiomas, propranolol also causes rapid involution within a short period.We now offer propranolol as a first-line treatment to all rapidly proliferating hemangiomas with functional deficit and/or disfigurement. We have developed a treatment protocol in conjunction with the cardiologist that involves pretreatment cardiac workup and an in-hospital titration of propranolol up to 1 mg/kg three times per day. So far, we have not needed to increase the dosage to more than 1 mg/kg three times per day.
Related post: Propranolol for Hemagiomas? (March 4, 2009)
REFERENCES
Wednesday, October 27, 2010
Dynamed/Skyscape
A week ago I attended a lunch lecture on Mobile Medical Apps given by Krystal Boulden, MLIS at UAMS. I knew about most of the ones she talked about: Epocrates, Clini-eGuide, PubMed on Tap, PubMed for Handhelds, and RefWorks. Of those, I only use Epocrates.
The one I didn’t know was the first one she highlighted: Dynamed (the actual app is Skyscape).
DynaMed - Clinical reference tool provided by the University of Arkansas for Medical Sciences (UAMS) Area Health Education Centers' Libraries (AHEC), Arkansas Children's Hospital Library, and the UAMS Library. Registration is required for access and renewal is required annually. Training is available through the Area Health Education Centers' Libraries and the UAMS Library. To register for DynaMed click here. To access DynaMed click here.
Choose content from top publishers, current guidelines, drug guides, interactive algorithms, calculators and much more.
Table of Contents SearchIncremental Search
SmartSearch™
History
Related Topics
SmartLink™
· eResources | eJournals
· eBooks | eReserves
· Clinical Resources
· UAMS Library Catalog
· Mobile Devices
· HRC Digital Collection
· Image Resources
Monday, May 17, 2010
FTM Chest Contouring – Lessons Learned
I wrote a post, Chest Wall Contouring in Female-to-Male Transsexuals, in December as I prepared to do my first such surgery. I was up front with him about him being my first FTM though not my first mastectomy.
Well, I had to perform a second procedure to correct the first. Here is what I learned from this experience:
1. A minimal scar is not worth having extra skin remain.
I opted for the first surgery to use a peri-areolar incision/scar feeling it would allow enough skin excision and leave less of a scar. The scar was smaller, but even after months to allow full contraction of the remaining skin turns out not enough skin excision.
The extended concentric circular scar looks good with a nice chest contour.
2. The inframammary crease must be fully obliterated.
I knew this from my reading. I thought I had done so. I recommend freeing up the skin from the chest wall a good 2 inches below the marked crease to ensure it’s destruction.
3. Use drains.
No matter how well you think you have controlled the hemostasis.
I am happy with the results after the revision. The patient is too if his smile and statement are any indication -- “I can now look at my chest without revulsion.”
Thursday, July 30, 2009
Raynaud’s Phenomenon of the Nipple
jeffreyleow RT @paulinechen: Camera Phones [patients taking pics] helps doctor make rare diagnosis http://3.ly/CXr (via @EllenRichter)Granted I am not generally asked about nipple pain in pregnant women. Those questions tend to go to folk like TBTAM or ER’s Mom.
The article describes a case report of a 25 yo woman in her 2nd trimester with “frequent episodes of extreme bilateral nipple pain. A typical episode lasted between 5 and 15 minutes and was so painful as to bring her to tears.”
Vasospasm of the arterioles manifesting as pallor (left), followed by cyanosis, and then erythema (centre). The right hand image shows the normal, asymptomatic, status.
As with Raynaud's of the hand (which I am more familiar with), the phenomenon tends to occur when the ambient temperature drops below a certain threshold that is specific to each individual. Exposure to cold should be avoided, as is avoidance of caffeine, nasal vasoconstrictors, and tobacco.
Additional treatment for Raynaud’s of the nipple:
Women with persistent pain require immediate relief to continue breastfeeding successfully. Recommended treatment is 30 mg nifedipine of sustained-release once-daily formulation, and most women respond within two weeks.
REFERENCE
An Underdiagnosed Cause of Nipple Pain Presented on a Camera Phone; BMJ 2009;339:b2553; O L Holmen, B Backe
Vasospasm of the Nipple–a manifestation of Raynaud's phenomenon: case reports; BMJ 1997 314: 644; Laureen Lawlor-Smith and Carolyn Lawlor-Smith
Monday, May 11, 2009
Dermatitis and Eczema – an Article Review
- lanolin (common in moisturizing creams and ointments)
- perfumes/fragrances
- cetylsterol alcohol (used as an emulsifier, stabilizer, and preservative in creams, ointments, and paste bandages)
- preservatives: quaternium 15, parabens, chlorocresol (all are used to prevent bacterial contamination in creams, but are not in ointments)
- rosin (colophony) -- a component of some adhesive tapes, bandages, or dressings
- rubber / latex
- Avoid wearing wool or nylon next to their skin as they may exacerbate itch. Choose materials made of cotton or corduroy which are softer.
- Rather than use fabric softeners and bleach, which may be irritating to the skin, add a white vinegar rinse in the washing machine rinse cycle cup/dispenser to remove excess alkaline detergent.
- Keep water exposure to a minimum.
- Use humectants or lubricants regularly to replenish skin moisture. Apply these agents immediately after bathing while the skin is damp.
- For severe hand eczema, cotton gloves may be worn at night to augment the moisturizing effect of humectants and other topical treatments.
- Topical steroids continue to be the mainstay therapy for treating dermatitis.
- Topical steroid creams can be kept in the refrigerator or combined with 0.5% to 1% of menthol (camphor and phenol are alternatives) to give a cooling effect. This often helps.
- Treat the dermatitis with a topical steroid when the skin is red and inflamed. Tapering the topical steroid use by alternating with moisturizers as the dermatitis resolves.
- Remember that percutaneous absorption of topical steroids is greatest on the face and in body folds. They suggest only weak or moderate preparations be used in these areas.
- Moderate to potent topical steroids should be used on the trunk and the extremities.
- The palms and soles are low-absorption areas, so may require very potent topical steroids
Monday, April 13, 2009
Preventing & Managing Dry Eye Syndrome after Periorbital Surgery– an Article Review
Successful surgery and prevention of persistent dry eyes entails(1) proper understanding of tear film anatomy physiology(2) preoperative recognition of risk factors through the history and physical examination(3) intraoperative maneuvers to maximize prevention(4) immediate and aggressive postoperative management.
Staging the upper and lower blepharoplasties in two separate operations may be considered.Corneal protection is an obvious, often overlooked aspect of blepharoplasty.Trauma or, more importantly, prolonged exposure can lead to corneal abrasion or ulceration.Conservative excision is critical. This entails accurate measurement with a caliper and leaving 8 to 9 mm in the pretarsal fold when performing an upper blepharoplasty.Skin resection in the lower blepharoplasty should be more conservative, taking into account that even if there is no lower lid retraction after resection, postoperative healing and scarring may eventually pull a lax lid down.The orbicularis oculi muscle should be preserved in both upper and lower blepharoplasty. Special attention is paid to not injure the innervation as well. Disruption may lead to a decreased blink rate and is a setup for evaporative tear loss.Canthopexy to correct lateral canthal depression and protect against ectropion is a safe measure that may be performed.
Edema may be controlled with head elevation and periorbital cool compresses.Immediately after surgery, normal tear film production is disrupted and may take several days to recover. Liberal use of artificial tears during the day and lubrication at night protect the eyes during this period.Topical antibiotic and steroid (TobraDex; Alcon Labs, Fort Worth, Texas) drops help in reducing the inflammatory response and preventing conjunctivitis.The systemic steroids are also continued by tapering oral corticosteroids over 5 days (Medrol Dosepak; Upjohn Co., Kalamazoo, Mich
Thursday, April 2, 2009
Complications After Autologous Fat Injections to the Breast – an Article Review
And this one (remember this study was done in Japan and I hope that the use of illegal silicone injection wouldn’t be done here in the U.S.)Case 2
A 37-year-old woman had undergone bilateral breast augmentation by autologous fat injection at a cosmetic clinic 3 years previously. Her breasts gradually became rigid and deformed, but she had no trouble with daily life. However, after having a child, she noticed an abnormal yellow secretion while breast-feeding. On her first visit to our facility, her breasts were clearly asymmetrical and deformed, and indurations were detected (Fig. 1). On mammography, computed tomography, and magnetic resonance imaging, large masses were detected in both breasts (Figs. 2 and 3). The tumors, which contained yellow fluid (Fig. 4), were removed surgically. Six months after the operation, both breasts were reconstructed with saline implants (Fig. 5). Abnormal breast secretion has not been observed since the masses were removed.
Case 12
A 33-year-old woman underwent buttock liposuction and fat injection to the breast at a cosmetic clinic 2 years previously. After the operation, she became aware of indurations and disfiguration of both breasts and visited our facility. Asymmetry of the breasts and huge indurations were palpable (Fig. 18). On preoperative blood examination, high levels of antinuclear antibodies were detected. On mammography, huge masses were detected in the subcutaneous tissue (Fig. 19). Chest computed tomography revealed multiple low-density areas encapsulated with high-density areas in the subdermis in both breasts. Magnetic resonance imaging indicated multiple injected fat with high-iso signal intensity on T1-weighted images and low signal intensity on T2-weighted images (Fig. 20). Surgery to remove the subcutaneous masses was performed. Our routine examination for foreign bodies using nuclear magnetic resonance detected a small amount of silicone contamination. This suggests that the high levels of antinuclear antibodies in the blood may be the result of an immunologic reaction to silicone (human adjuvant diseases). These observations suggest that the patient had been injected with silicone at the time of surgery without her consent.
They give a very nice discussion of fat injection which includes some history
It appears that fat injection was first performed in 1893, when the German physician Franz Neuber9 used a small piece of upper arm fat to build up the face of a patient whose cheek bore a large pit caused by a tubercular inflammation of the underlying bone.
As a result, there remains a dearth of studies examining the long-term safety and efficacy of this technique. This technology, especially with regard to its use in breast augmentation, must be tested by multi-institutional long-term studies with careful breast cancer surveillance.
We believe that this has resulted in many victims, who are exemplified by the 12 patients that we have described in this article. The problems associated with this inadequately tested procedure are also exacerbated by a widespread decline in the skills of aesthetic surgeons because of the influx of many untrained and unskilled individuals, especially in some Asian countries, including Japan.
The complications associated with autologous fat grafting to the breast are well known, and include calcifications and oil cysts. These calcifications may mask or cover the microcalcifications associated with carcinomas. Remember fat grafting is “grafting” and there can be fat necrosis.
I admire their conclusions paragraph:
Autologous fat grafting to the breast is not a simple procedure and should be performed by well-trained and skilled surgeons. Patients should be informed that it is associated with a risk of calcification, multiple cyst formation, and indurations, and that breast cancer screens will always detect abnormalities. Patients should also be followed up over the long-term and imaging analyses (e.g., mammography, echography, computed tomography, and magnetic resonance imaging) should be performed.
Previous Post on Topic
Fat Injections for Breast Augmentation (November 6, 2008)
REFERENCE
Monday, March 23, 2009
Be a Potential Hero – Learn CPR
Earlier this month the Arkansas Legislators passed a bill to put AED devices in all public schools in our state. The bill was sponsored by Senator Tracy Steele. It is estimated that about $1 million dollars will be needed to pay for the devices. The money is expected to come from the recently passed increased tobacco tax (an extra 56 cents per pack).
Monday, March 16, 2009
Requirement of Perioperative Stress Doses of Corticosteroids -- an Article Review
To determine the requirement for perioperative supplemental (stress) doses of corticosteroids in patients receiving long-term corticosteroid therapy and undergoing a surgical procedure.
Their resultsTwo of the studies were prospective, double-blind, randomized, placebo-controlled studies in which patients received perioperative stress doses of corticosteroids or placebo together with their usual maintenance dose of corticosteroid.In 2 studies, corticosteroid therapy was stopped before surgery (18 and 36 hours before surgery). Stress doses of corticosteroids were not administered.In an additional 5 studies patients were followed up after receiving only their usual daily maintenance dose of corticosteroid. Stress doses of corticosteroids were not administered.
The 2 randomized placebo-controlled studies included in this review did not detect a difference in the hemodynamic profile of patients treated with stress doses of corticosteroids compared with patients treated with their usual dose of corticosteroid alone.These results are supported by the 5 cohort studies in which patients received their usual daily dose of corticosteroid without the addition of stress doses of corticosteroids; none of the patients in those 5 studies developed an adrenal crisis.One patient in each of the studies by Jasani et al and Kehlet and Binder developed a possible adrenal crisis that responded rapidly to hydrocortisone treatment; in those patients, corticosteroid therapy was stopped 36 and 48 hours before surgery.
REFERENCEThese recommendations do not apply to patients who receive physiologic replacement doses of corticosteroids because of primary dysfunction of the HPA axis (eg, patients with primary adrenal failure due to Addison disease, with congenital adrenal hyperplasia, or with secondary adrenal insufficiency due to hypopituitarism). It is likely that these patients are unable to increase endogenous cortisol production in the face of stress. These patients require adjustment of their glucocorticoid dose during surgical stress under all circumstances.
Requirement of Perioperative Stress Doses of Corticosteroids: A Systematic Review of the Literature; Arch Surg, Dec 2008; 143: 1222 – 1226; Paul E. Marik; Joseph Varon
Perioperative Steroid Coverage (my blog post; November 3, 2007)
Wednesday, March 4, 2009
Propranolol for Hemagiomas?
Panel A shows the patient at 9 weeks of age, before treatment with propranolol, after 4 weeks of receiving systemic corticosteroids (at a dose of 3 mg per kilogram of body weight per day for 2 weeks and at a dose of 5 mg per kilogram per day for 2 weeks).Panel B shows the patient at 10 weeks of age, 7 days after the initiation of propranolol treatment at a dose of 2 mg per kilogram per day while prednisolone treatment was tapered to 3 mg per kilogram per day. Spontaneous opening of the eye was possible because of a reduction in the size of the subcutaneous component of the hemangioma.Panel C shows the patient at 6 months of age, while he was still receiving 2 mg of propranolol per kilogram per day. Systemic corticosteroids had been discontinued at 2 months of age. No subcutaneous component of the hemangioma was noted, and the cutaneous component had considerably faded. The child had no visual impairment.Panel D shows the child at 9 months of age. The hemangioma had continued to improve, and the propranolol treatment was discontinued.
REFERENCES
Propranolol for severe hemangiomas of infancy; New Engl J Med 2008; 358: 2649-2651; Léauté-Labrèze, C et al
Ulcerated Hemangiomas of Infancy: Risk Factors and Management Strategies; eLiterature Review (John Hopkins Medicine) , Oct 2007, Vol 1, No 4; Bernard A. Cohen, MD, Susan Matra Rabizadeh, MD, MBA, Mark Lebwohl, MD, and Elizabeth Sloand, PhD, CRNP
Related Blog Posts
Vascular Birthmarks (July 15, 2007)
Early Surgical Intervention for Proliferating Hemagiomas of the Scalp -- An Article Review (Sept 1, 2008)
Wednesday, February 25, 2009
Prevention and Management of Complications of Rhinoplasty – an Article Review
This article is a CME (continuing medical education) article. As such it is a review of complications of rhinoplasty. It is a good review and worth reading.
complications following nasal surgery.
mucosa.
- 60-degree head elevation
- gentle nostril pressure for 15 minutes
- application of topical decongestant nasal sprays such as oxymetazoline or phenylephrine.
- Remove the septal splints and gently suction the nasal passages remove blood clots and crusts.
- Cauterize focal areas of bleeding with silver nitrate or place a light hemostatic packing made of methylcellulose over the bleeding surface.
Bleeding that persists despite anterior packing may signify
a posterior bleed from a branch of the sphenopalatine
artery. If so, a posterior pack may be required.
- Patients should be observed for airway compromise while a posterior pack is in place.
- Antibiotics should be administered while packing is in place to reduce the risk of toxic shock syndrome.
- early recognition with prompt evacuation of the hematoma, either via needle aspiration or incision and drainage.
- Antimicrobial therapy should be initiated if a secondary nasal septal abscess is suspected.
rhinoplasty include the nasal dorsum, nasal tip, and septum.
L-Strut Fractures --
When L-strut fractures occur, they should be repaired immediately to prevent significant deformity. If it isn’t, the cartilaginous septal segment will tend to rock posteriorly, resulting in a loss of dorsal support and a saddle-nose deformity.
Kirschner wires.
Epiphora -- after rhinoplasty is most commonly occurs due to compression of the lacrimal system by the soft-tissue edema. It normally resolves after 1 to 2 weeks.
Functional Complications
whistling, and nasal airway obstruction due to disruption
of the normal laminar airflow through the nasal passages.
- Local hygiene with nasal saline irrigation
- Obturation with a Silastic septal button
- For small perforations, local advancement flaps with an interposed connective tissue autograft or an allograft can be
used to close the perforation.
Postoperative Septal Deviation -- whether new or uncorrected, following septorhinoplasty is a source of frustration for both the patient and the surgeon. Any significant septal deviation that persists and causes cosmetic or functional impairment may require revision surgery.
the intranasal mucosa. These patients are often effectively treated with topical anticholinergic preparations, such as 0.03% ipratropium bromide which act locally to decrease the watery rhinorrhea. The recommended dosing regimen is two sprays in each nostril two to three times a day as needed.
Postoperative deformities of the osseocartilaginous framework may be caused by overresection or underresection of the osseocartilaginous framework, incorrectly performed osteotomies, incorrect shaping of grafts and their edges, and migration of grafts due to insufficient or inaccurate fixation.
Supratip (“Pollybeak”) Deformity -- is a postoperative complication of rhinoplasty in which the nasal supratip assumes a convex shape in relation to the nasal dorsum. The deformity results either from inadequate resection of the lower dorsal septum and upper lateral cartilages or, paradoxically, from overresection of these supratip structures with subsequent scar tissue formation in the resulting dead space.
dermis in the supratip area. The injections may be repeated at 2-month intervals until an aesthetically pleasing supratip contour is obtained.
deformity of the skin. Other side effects include telangiectasias, depressions, color changes, and eventual visibility of the underlying cartilages or contour imperfections, which may be enhanced by the resulting decrease of skin thickness.
at least 1 year after the initial procedure.
The basic principles include judicious removal of the offending cartilage or scar tissue, adjustment of the osseocartilaginous framework so that the differential between the midvault and the tip is adequate, elimination of dead space by establishing direct contact between the underlying framework and the skin, and application of a dressing with selective compression over the supratip area.
Soft-Tissue Complications
Postrhinoplasty Nasal Cysts -- are a rare complication
of rhinoplasty. The most common site of occurrence for both types of cysts is the nasal dorsum. Both may require complete excision.
- Lipogranulomas or “paraffinomas” are foreign-body inclusion cysts that are thought to arise from the use of petroleum-based
ointments in conjunction with nasal packing. - Mucous cysts are a second type of nasal cyst that can arise after rhinoplasty. They are thought to arise from ectopic or displaced mucosa and ointment extravasation into osteotomy sites.
- removal of the offending agent
- application of topical and potentially systemic steroids,
depending on the severity of the reaction.
Treatment of minor skin necrosis should initially be conservative.
- Daily wound care, allow the wound to close by secondary intention
- Protection from the sun
- After maturation of the scar, dermabrasion, filler substances, skin care, and laser treatment may be helpful.
Telangiectasias -- are small superficial vessels of the skin visible to the human eye and usually measure 0.1 to 1.0 mm in diameter. Argon and pulsed dye lasers have proven to
be an effective means of treatment.
Monday, February 16, 2009
Myofascial Compartments of the Hand in Relation to Compartment Syndrome --- an Article Review
Few studies have outlined the myofascial compartments of the hand. The standard anatomy texts do not show actual anatomical specimens but instead rely on diagrams and figures to outline the various compartments. These include the thenar, hypothenar, adductor, and interosseous compartments, each encased in fascia that extended from one metacarpal to another
The ten anatomical compartments of the hand include (photo credit)
- four dorsal interossei
- three palmer interossei
- adductor pollicis
- thenar
- hypothenar
Results:Interesting findings, but doesn’t explain why it is necessary to do the fasciotomies in each and every compartment. Does the skin constrict that much? Maybe.
There was no well-defined tough fascia overlying the thenar muscles, the hypothenar muscles, or the adductor pollicis.
Areolar tissue was present between the individual thenar and hypothenar muscles.
A distinct band of fascia was noted over the entire length of the ulnar three dorsal interosseous muscles.
A band of fascia was noted over the distal portion of the palmar interossei but not over the proximal aspect.
The above findings were found in all 14 specimens.
A layer of loose areolar tissue was noted over the dorsal aspect of the first web space in eight specimens, whereas a distinct band of fascia was noted overlying the first dorsal interosseous muscle in the remaining six.
REFERENCES
Wednesday, February 11, 2009
Sulfonamide Associated Hepatic Failure
Three forms of SMX/TMP induced liver damage have been described.
1) hepatocellular
2) mixed hepatocellular cholestatic
3) bile duct injury with ductopenia or Vanishing Bile duct syndrome
REFERENCES
Harrison’s Online; Chapter 299 (Merck’s)-- Trimethoprim-Sulfamethoxazole Hepatotoxicity (Idiosyncratic Reaction)
Thursday, January 29, 2009
Refinements in Nasal Reconstruction – an Article Review
The article “Refinements in Nasal Reconstruction: The Cross-Paramedian Forehead Flap” and the “discussion” both recently published in the Journal of Plastic and Reconstructive Surgery (see full references below) give a truly nice review of the procedure.
Stage 1
The cross-paramedian forehead flap is based on the supratrochlear vessel contralateral to the nasal defect. The flap is designed to extend across the midline of the forehead to the contralateral side. The flap is an axial pedicle flap until it crosses the midline. The distal third of the flap crosses the midline to become a random flap.The flap is elevated in the subgaleal plane from distal to proximal to the supraorbital region. The dissection plane becomes subperiosteal at the level of the upper eyebrow. Inferior dissection is carried into the orbit in the subperiosteal plane to facilitate a safe arc of rotation without tension.The periosteum is incorporated at the most inferior extent of the pedicle and carefully freed toward the supratrochlear vessels to facilitate flap rotation. The pedicle is designed with a narrow skin bridge 8 mm in width with a sufficiently wide subcutaneous and galeal pedicle to safely include the supratrochlear vessels. The narrow skin pedicle is carried below the medial eyebrow toward the medial canthus.The forehead flap is mobilized and rotated downward into the nasal defect. If the flap appears robust, the frontalis muscle can be thinned from the distal half. The flap is folded on itself distally to replace the nasal lining if necessary. This design provides a longer hairless flap, which is advantageous when reconstructing lining. The donor site is closed primarily. We prefer to base the pedicle on the contralateral side of the defect because it provides a smooth arc of rotation and a longer non-hair-bearing flap.
Both article and discussion are worth your time to read and study.Stage 2
The flap is divided and inset at 2.5 to 3 weeks. The skin width is narrow proximally and is excised in or parallel to the glabellar frown line. This results in a linear scar in the glabella region.Secondary refinements of the forehead flap may be necessary to defat the flap and refine the aesthetic contour.
REFERENCES
Thursday, January 22, 2009
Splinting after CTR – an Article Review
I admit, I splint after carpal tunnel release (CTR), though after reading this article I will change my ways. My use of splints after CTR has been because “I was taught that in training”. Not always a bad thing, but not always a good thing either. I was reminded of this by the opening of the article (first reference below):
Dogma is pervasive in all of medicine, and hand surgery is no exception. As the movement toward evidence-based medicine continues, clinical researchers have striven to dispel dogmatic practices for which no scientific support exists. One such target is the practice of splinting after carpal tunnel release. There have been five prospective, randomized trials, all since 1995, showing that postoperative splinting after this procedure is of no benefit, with one of them demonstrating that it is actually detrimental.
In their discussion section, the authors reviewed the five articles (2-6 references below) that show no advantage and some disadvantage to postop splinting. Here is what they say in summarizing the article by Cook et alFifty-three percent of respondents use full-time splinting postoperatively.Five percent of these respondents also prescribe the use of night splints after a variable period of full-time splinting.Night splinting is used as the only postoperative immobilization by 1 percent of respondents (night splinting was not offered as an option on the questionnaire so may be underrepresented as it required a write-in response)In addition, 1 percent of respondents wrote that they apply a bulky dressing. This practice was not counted as splinting.Within the subset of surgeons who apply splints after carpal tunnel release, there is tremendous variation in splinting duration, with a range of 1 day to 6 weeks.The duration reported most frequently (i.e., the mode response) within this subset is 7 days.It is noteworthy, however, that when considering the entire survey population, the most frequently reported duration is, decisively, 0 days (i.e., no splinting).
In the first of these trials, Cook et al randomized 50 patients undergoing open carpal tunnel release to be splinted for 2 weeks postoperatively or to begin unrestricted active motion on the first postoperative day.The prevention of flexor tendon bowstringing is frequently cited as the reason for splinting after carpal tunnel release. The authors of this survey article notes that
The drawbacks of immobilization were striking. At 1-month follow-up, the splinted group fared significantly worse with respect to the incidence of scar tenderness and pillar pain, patients' subjective pain rating, grip and key pinch strength, and patients' assessment of outcome.
Even more conspicuous was the splinted group's slower return to activities of daily living (12 days versus 6 days; p = 0.0004) and light-duty work (27 days versus 17 days; p = 0.005).
There were no wound complications, hematomas, bowstringing or adherence of flexor tendons, or neuromas in either group.
The authors concluded that splinting is largely detrimental but acknowledged that certain rare complications, such as bowstringing, might occur in a larger series. They recommended early mobilization but advised against simultaneous finger and wrist flexion, which might be more likely to result in bowstringing
To our knowledge, this complication has been reported only once, in a 1978 article by McDonald et al. In their series of 186 carpal tunnel releases, bowstringing was observed in two patients. Interestingly, these patients were splinted postoperatively, and in both cases the bowstringing occurred after reoperative carpal tunnel release.In their words, Bowstringing of the flexor tendons is a rare complication, possibly occurring as a result of removing a segment of the transverse carpal ligament or from inadequate immobilization following a carpal tunnel release.
Wednesday, January 21, 2009
Scars and Their Therapy – an Article Review
As I continue to catch up on my journal reading, I thought I would review and share this (full reference below) article with you on scars and current therapies.
The list and discuss the following as emerging scar-reducing therapies:
COX-2 Inhibitors and Nonsteroidal Antiinflammatory Drugs:TGF-β has been studied as a potential scar-reducing agent since the 1980s. TGF-β1, TGF-β2, and TGF-β3, have been demonstrated to have major roles in scar production. Investigations of TGF-β as a scar-reducing agent have sought to simulate the fetal wound-healing environment by increasing the relative ratio of TGF-β3 to TGF-β1 and TGF-β2 to minimize scarring. There are several ongoing Phase II clinical trials evaluating Juvista, human recombinant TGF-β3, with the next trials due to report in mid 2008. Although demonstrating positive preliminary efficacy with high safety, it remains to be seen with great anticipation what the long-term efficacy in larger trials will be compared with current therapy and what practical role if any TGF-β-modulating agents will play in future therapeutic protocols.
There has been growing interest in the role of the COX-2 pathway in scar reduction. Topical application of a selective COX-2 inhibitor immediately after wounding resulted in a statistically significant reduction in local neutrophils, prostaglandin E2 levels, TGF-β1, collagen deposition, and scar formation in a mouse study. Of note, it has been demonstrated that topical application of COX-2 inhibitors does not have a negative effect on wound reepithelialization. There is conflicting evidence on the effect of constitutive inhibition of COX-1 and COX-2 on wound healing. One study has suggested that inhibition of COX-1 may cause delayed wound healing, whereas another study demonstrates no delay in wound healing.
Collagen Synthesis Inhibitors
Modulation of collagen metabolism is another potential target for preventing excessive scar formation. ……………. has shown modest benefit of scar reduction to date, and these remain agents of interest for further investigation.
Angiotensin-Converting Enzyme Inhibitors
It is well accepted in the cardiovascular literature that up-regulation of angiotensin-converting enzyme participates in adverse fibrous cardiac remodeling. Recent studies have shown that a locally functioning tissue renin-angiotensin system operates in human skin. It has been demonstrated that exogenous angiotensin II may accelerate wound healing in animal models. ……… Further investigation of their role in scar reduction is warranted.
Minocycline
A recent study found that systemically administered minocycline significantly reduced the severity of hypertrophic scarring in a rabbit ear scar model. The mechanism by which minocycline reduces scar formation in this model remains unanswered. …… Additional studies are needed to elucidate the mechanism of this intriguing agent.
Gene Therapy
There have been few published studies, limited to animal models, using gene therapy to investigate scar reduction. To date, fibroblasts have been used as the primary targets for a gene therapy approach to scar reduction. A major obstacle is that scarring is a very complicated process involving many different factors, and much of the outcome of scar formation is likely programmed by the early inflammatory response to wounding. Most studies to date have demonstrated modest or inconclusive results on scar formation.
They list and discuss the following as currently available scar-reducing therapies:
Topical and Intralesional Corticosteroid Injections
Triamcinolone is currently the most commonly used corticosteroid for the treatment of scars. When used as a monotherapeutic agent, studies show 50 to 100 percent efficacy of intralesional injection of triamcinolone. However, many of these studies lack well-designed controls and standardized objective measures of scar outcome and thus are of limited value………
5-Fluorouracil
Use of intralesional 5-fluorouracil for treatment of hypertrophic scars has been shown to be effective in multiple studies. However, most of these studies lack adequate controls and are of limited value. Combinations of 5-fluorouracil with intralesional corticosteroids and pulsed dye laser have been used to achieve better results than 5-fluorouracil as a monotherapy. Notably, the combination of 5-fluorouracil with corticosteroids has been shown to decrease the side effects related to prolonged therapy with corticosteroids alone. …….
Bleomycin
Bleomycin is an antibiotic with well-known antitumor, antibacterial, and antiviral activity. Studies have shown that intradermal injection or the multipuncture method of bleomycin injection results in significant improvement in keloids and hypertrophic scars. However, all of these studies involved a small sample size and lack well-designed controls and thus are of limited value. ……Adverse sequelae of bleomycin include hyperpigmentation (75 percent) and dermal atrophy in the skin surrounding treated scars (10 to 30 percent). Further large controlled trials are needed to evaluate the efficacy of bleomycin.
Laser Therapy
Pulsed dye laser therapy has been shown to have positive efficacy in numerous studies, but many of these studies lack well-designed controls and are of limited value. The primary indication for pulsed dye laser is to reduce erythema. Pulsed dye laser therapy is based on the principle that hypervascularity plays a key role in scar appearance. ……Common side effects of pulsed dye laser treatment include posttreatment purpura, which usually subsides after 7 to 10 days, and hyperpigmentation in 1 to 24 percent of patients. ……… if further controlled trials support its efficacy.
Silicone Gel Sheets
Numerous studies have demonstrated the utility of silicone gel sheeting in treating hypertrophic scars but overall yield inconclusive evidence for its mechanism of action and efficacy in reducing existing scars. Silicone gel sheeting has also been investigated for its potential utility in scar prophylaxis when applied in the postoperative period. Controlled studies investigating silicone gel sheeting applied to wounds immediately and 2 weeks postoperatively significantly decreased scar volume over controls in mirror-image incisional wounds. However, the largest controlled study demonstrated no improvement in scar prophylaxis. A recent Cochrane review cites 13 trials involving 559 patients and concludes there is weak evidence of a benefit of silicone gel sheeting as a prevention for abnormal scarring in high-risk individuals, but most studies are of poor quality and highly susceptible to bias…….
Pressure Therapy
Pressure therapy has been a conservative management of scars since the 1970s, despite a paucity of well-designed controlled clinical studies demonstrating its efficacy. ……..The largest randomized controlled trial showed no significant differences in scar reduction with pressure therapy compared with controls.Current evidence does not support the efficacy of pressure treatment as a monotherapy for scar reduction. The appropriate role of pressure therapy in scar reduction protocols may be as an adjunctive treatment as part of a polytherapeutic strategy of scar management, but this must first be evaluated in clinical studies.
Cryotherapy
There have been many reports of cryotherapy used as a combination therapy with surgical excision for hypertrophic scar and keloid reduction. Most of these studies are difficult to evaluate because of small sample sizes and lack of adequate controls. …… The main adverse effects reported were atrophic depressed scars and residual hypopigmentation (75 percent of cases). ….. there is limited evidence for the long-term efficacy of cryotherapy for scar reduction.
Radiation
Radiation therapy has been used in scar management primarily in the treatment of keloids, frequently being used as an effective adjunct to surgical excision. Radiation likely mediates its effects on keloids through inhibition of proliferating fibroblasts and neovascular bud formation, resulting in decreased collagen production.Surgical excision in combination with radiotherapy is considered the most effective treatment available for severe keloids. There is limited and inconclusive evidence regarding optimal dosage, fractionation, indications for treatment, or timing of radiotherapy with respect to surgical procedures. However, a single dose given within 24 hours of excision appears to yield the highest cure rate in recurrent keloids. …….
Surgical Treatment
There are many different surgical strategies for scar revision, including excision with linear closure, excision with split- or full-thickness skin grafting, Z-plasty, W-plasty, and if all other options fail, excision followed by flap coverage. Tissue expansion and serial scar excision may be used to provide more tissue for advancement or local flap coverage of revised scars……
There is a great need to use large controlled trials to examine currently available and emerging strategies of scar reduction to standardize scar treatment protocols and evaluate emerging agents that could potentially benefit patients with scars refractory to currently available treatments. Two major shortcomings of current clinical studies include (1) a lack of well-designed controls and (2) a lack of standardized and comprehensive evaluative measurements of scar outcome.
REFERENCE
Scars: A Review of Emerging and Currently Available Therapies; Plastic & Reconstructive Surgery. 122(4):1068-1078, October 2008; Reish, Richard G. M.D.; Eriksson, Elof M.D., Ph.D.
Other related posts:
Skin – Healing a Simple Wound/Laceration
Scar Prevention
Wednesday, January 14, 2009
Maggot Therapy
Recently read a new article (the sixth one in the references below) on “maggot therapy” and couldn’t resist updating the one I first did in October 2007.
Maggot Therapy
From the sixth reference article regarding use of maggots in the United States:
Maggots are available only by prescription.
The Food and Drug Administration regulates the use of medical maggots, as not all species are therapeutic or safe.Approved use currently exists for the debridement of non-healing necrotic skin and soft tissue wounds that include pressure ulcers, venous ulcers, neuropathic foot ulcers, and non-healing traumatic or postsurgical wounds.In the United States, the supplier of Medical Maggots is Monarch Labs in Irvine, California. A vial of 250 to 500 larvae costs approximately $88 plus shipping and handling. The number of vials needed will be determined by the wound size and duration of therapy. Many wounds require only 1 to 2 applications over a 3- to 7-day period.
REFERENCES
My Old Blog Posts
Maggot Therapy, October 31, 2007
Maggot Therapy Revisited, August 11, 2008